Novel Low-Power Switched-Current Matched Filter for Direct-Sequence Code-Division-Multiple-Access Wireless Communication
Novel Low-Power Switched-Current Matched Filter for Direct-Sequence Code-Division-Multiple-Access Wireless Communication
复制标题
用于直接序列码分多址无线通信的新型低功耗开关电流匹配滤波器
DOI：
10.1143/jjap.39.2301
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发表时间：
2000
影响因子：
1.5
通讯作者：
K. Tsubouchi
中科院分区：
文献类型：
--
作者：
K. Togura;K. Kubota;H. Nakase;K. Masu;K. Tsubouchi
我们提出了一种低功耗小于10mw的电流切断开关电流匹配滤波器（CC-SIMF），用于直接顺序码分多址的移动终端。为了减小传统串行SIMF的电流传输误差累积，提出了并联SIMF结构。为了评估并联SIMF的基本工作原理，我们采用0.8µm互补金属氧化物半导体（CMOS）技术设计并制造了一个32片的并联SIMF。32片正交m序列的自相关性能明显大于5 Mcps。与传统的SIMF相比，测量的动态范围提高到12 dB，即使每个芯片的电流存储单元的电流传输误差超过10%。由于并联SIMF中的电流源可以减少到串行SIMF的三分之一，因此并联SIMF的功耗可以降低到串行SIMF的三分之一。
We have proposed the current-cut switched-current matched filter (CC-SIMF) with a low power consumption of less than 10 mW for mobile terminals in direct-sequence code-division-multiple-access. The parallel SIMF configuration is proposed for the reduction of the current transfer error accumulation in the conventional serial SIMF. In order to evaluate the fundamental operation of the parallel SIMF, we have designed and fabricated a 32-chip parallel SIMF using 0.8-µm complementary-metal-oxide-semiconductor (CMOS) technology. The autocorrelation performance of a 32-chip orthogonal m-sequence has been clearly observed to be more than 5 Mcps. The measured dynamic range is improved to 12 dB as compared with that of the conventional SIMF, even though each current memory cell has a current transfer error of over 10% per chip. Since the current sources in the parallel SIMF can be reduced to be one-third of those in the serial SIMF, the power consumption of the parallel SIMF can be reduced to one-third of that of the serial SIMF.